GB1443885A - Radar system with brightness and resolution - Google Patents
Radar system with brightness and resolutionInfo
- Publication number
- GB1443885A GB1443885A GB4546674A GB4546674A GB1443885A GB 1443885 A GB1443885 A GB 1443885A GB 4546674 A GB4546674 A GB 4546674A GB 4546674 A GB4546674 A GB 4546674A GB 1443885 A GB1443885 A GB 1443885A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radar
- amplifier
- processor
- aerial
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/2806—Employing storage or delay devices which preserve the pulse form of the echo signal, e.g. for comparing and combining echoes received during different periods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/04—Display arrangements
- G01S7/06—Cathode-ray tube displays or other two dimensional or three-dimensional displays
- G01S7/068—Cathode-ray tube displays or other two dimensional or three-dimensional displays with data-rate converters preceding the display, e.g. flicker free display, constant brightness display
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
1443885 Pulse radar RAYTHEON CO 21 Oct 1974 [5 Nov 1973] 45466/74 Heading H4D A variable range radar system comprises means for converting radar returns into digital samples, writing means operative to write the samples into digital storage means, and reading means operative to read out the stored samples to display means at a rate which is lower than the writing rate for at least some range settings of the system. At short radar range settings a considerable improvement in display brightness is obtained, since the read out may be extended up to the whole of the normal scan period of the display. The storage means may make use of a random access memory or a plurality of shift registers. In an embodiment, transmission is initiated by a pulse generator 216, Fig. 1, which is coupled to a magnetron 212 via a modulator 215 and a transformer 214. Output from the magnetron is coupled through a duplexer 210 to an aerial 208. Received radar return signals are fed from the aerial through the duplexer as one input of a mixer 226, which has another input from a klystron 222. Output from the mixer at I.F. is coupled via an amplifier 224 to a radar video digital processor 230. The aerial and associated apparatus are rotatable by a motor 220, and may be mounted on a mast of a ship. A heading line switch 206 produces a pulse output each time the aerial is pointing in the same direction as the ship. This pulse provides a marker on the display, for the information of the operator. The processor 230 is contained in an indicator unit 109, and, in addition to the video signal input from the amplifier 224, it receives inputs from the pulse generator 216, a clock generator 228, and a range switch 232. The processor converts the incoming radar return signals to digital form, stores them and, after reception has been completed for one radar return time, reads them back to a CRT display unit 233. The write-in rate is determined by the setting of the switch 232 and may be, for at least some settings, inversely proportional to range. The read-out rate may be, for at least some settings, constant. After being read out of storage within the processor 230, the radar return signals are reconverted to analogue form and are coupled via an amplifier 236 to the cathode of a CRT 246. The beam of the CRT 246 is deflected by coils 248, which are connected to a deflection amplifier 234, and which are rotated around the neck of the tube by a motor 246, coupled through clutch and latch 244. The pulse from the heading line switch 206 is used to synchronize the motor 242 with the direction in which the aerial 208 is headed. The output of a generator 235 constitutes deflection waveforms which are fed to the amplifier 234. The said generator is controlled by an output on a line 260 from the processor 260. Circuitry for the radar video processor is described with reference to Figs. 3A, 3B, (not shown). The incoming video signals are first converted to digital form, and use is made of a plurality of banks of shift registers for their storage and read-in and read-out at rates determined by the settings of the range switch 232. The outputs from the shift registers in the final bank are combined, and are then converted to analogue form for application to the video amplifier 236.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US41313073A | 1973-11-05 | 1973-11-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1443885A true GB1443885A (en) | 1976-07-28 |
Family
ID=23635968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4546674A Expired GB1443885A (en) | 1973-11-05 | 1974-10-21 | Radar system with brightness and resolution |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS5081091A (en) |
CA (1) | CA1049120A (en) |
DE (1) | DE2452448C2 (en) |
DK (1) | DK151648C (en) |
FR (1) | FR2250117B1 (en) |
GB (1) | GB1443885A (en) |
IT (1) | IT1023153B (en) |
NL (1) | NL183252C (en) |
NO (1) | NO142932C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4443797A (en) * | 1980-01-22 | 1984-04-17 | Decca Limited | Radar display apparatus |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4097863A (en) * | 1976-08-06 | 1978-06-27 | Raytheon Company | Marine radar system with independent switched power supplies |
US4058810A (en) * | 1976-08-13 | 1977-11-15 | Raytheon Company | Stabilized digital PPL radar system |
US4068233A (en) * | 1976-08-13 | 1978-01-10 | Raytheon Company | Radar system having interference rejection |
US4205313A (en) * | 1978-04-25 | 1980-05-27 | Raytheon Company | Marine radar including anticollision unit |
JPS5984174A (en) * | 1982-11-08 | 1984-05-15 | Fujitsu Ltd | Video signal display system of multirange radar receiver |
JPS59147283A (en) * | 1983-02-10 | 1984-08-23 | Tokyo Keiki Co Ltd | Signal processor |
JPS6034848A (en) * | 1983-08-06 | 1985-02-22 | Isowa Ind Co | Sticking method of printing seal on film base and apparatus for implementing the same |
JPS6288970U (en) * | 1986-06-11 | 1987-06-06 | ||
DE3824163A1 (en) * | 1988-07-16 | 1990-01-18 | Messerschmitt Boelkow Blohm | Separating sensor |
DE3933437A1 (en) * | 1989-10-06 | 1991-04-18 | Diehl Gmbh & Co | Radar installation range and orientation determination - uses processors to determine range and orientation in conjunction with data reduction equipment to simplify final processing |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1070700B (en) * | 1960-05-05 | Siemens a Halske Aktiengesellschaft Berlin und München | Bandwidth compression method for radar image signals | |
DE1020693B (en) * | 1956-04-04 | 1957-12-12 | Dr Helmut Roeschlau | Process for the magnetic storage of the impulses to be displayed in radar screens |
DE1026802B (en) * | 1957-02-13 | 1958-03-27 | Siemens Ag | Method for narrow-band electrical transmission of radar screen images |
US3478323A (en) * | 1966-11-14 | 1969-11-11 | Hughes Aircraft Co | Shift register controlled analog memory system |
US3539966A (en) * | 1968-07-23 | 1970-11-10 | Us Army | Microwave connector |
US3631483A (en) * | 1970-02-19 | 1971-12-28 | Westinghouse Electric Corp | Short persistence radar display system |
US3739083A (en) * | 1971-08-04 | 1973-06-12 | Northrup Corp | Digital system for band width reduction of video signals |
JPS5040914A (en) * | 1973-08-14 | 1975-04-15 |
-
1974
- 1974-10-02 CA CA74210628A patent/CA1049120A/en not_active Expired
- 1974-10-21 GB GB4546674A patent/GB1443885A/en not_active Expired
- 1974-10-25 NO NO743856A patent/NO142932C/en unknown
- 1974-10-29 NL NLAANVRAGE7414108,A patent/NL183252C/en active Search and Examination
- 1974-10-30 JP JP49125327A patent/JPS5081091A/ja active Pending
- 1974-10-31 IT IT53852/74A patent/IT1023153B/en active
- 1974-11-04 DK DK573474A patent/DK151648C/en not_active IP Right Cessation
- 1974-11-05 FR FR7436716A patent/FR2250117B1/fr not_active Expired
- 1974-11-05 DE DE2452448A patent/DE2452448C2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4443797A (en) * | 1980-01-22 | 1984-04-17 | Decca Limited | Radar display apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE2452448A1 (en) | 1975-05-28 |
NL7414108A (en) | 1975-05-07 |
NO142932C (en) | 1980-11-12 |
JPS5081091A (en) | 1975-07-01 |
DK151648C (en) | 1988-07-25 |
CA1049120A (en) | 1979-02-20 |
DK151648B (en) | 1987-12-21 |
AU7399474A (en) | 1976-04-08 |
FR2250117B1 (en) | 1980-04-04 |
FR2250117A1 (en) | 1975-05-30 |
NO743856L (en) | 1975-06-02 |
NO142932B (en) | 1980-08-04 |
DK573474A (en) | 1975-07-07 |
NL183252C (en) | 1988-09-01 |
DE2452448C2 (en) | 1985-02-14 |
IT1023153B (en) | 1978-05-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931021 |